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GasMultiBloc® Combined regulator and safety shut-off valves Two-stage function MB-ZRD(LE) 405 - 412 B01

Printed in Germany • Edition 02.10 • Nr. 214 763

7.24

1…6

Technical description The DUNGS GasMultiBloc® integrates filter, regulator, valves and pressure switches in one compact fitting. - Dirt trap: microfilter - One regulator and two main valves: B01 - One one-stage valve and one two-stage valve - One valve is fast opening, one valve is slow or fast opening - Solenoid valves up to 360 mbar (36 kPa) as per DIN EN 161 Class A Group 2 - Sensitive setting of output pressure by proportional regulator as per DIN EN 88 Class A Group 2 - High flow rates with low pressure drop - DC solenoid drive interference degree N - Main volume restrictor and partial volume restrictor at valve V2 - Hydraulic opening delay - Flange connections with pipe threads as per ISO 7/1 - Simple mounting, compact, light-weight

The modular system permits individual solutions by using external ignition gas tap in connection with separately controlled valves, by adding a valve proving system, mini/maxi pressure switches, pressure limiters, limit switch and closing stroke limiter at valve V2, regulator blocking for liquid gas applications. Application The modular system permits individual solutions in gas safety and regulator engineering. Suitable for gases of families 1, 2, 3 and other neutral gaseous media. Approvals EC type test approval as per EC Gas Appliance Directive: MB-ZR...405-412 B01 CE-0085 AP 3156 EC type test approval as per EC Pressure Equipment Directive: MB-ZR...405-412 B01 CE0036 Approvals in other important gas consuming countries.


Functional description of gas flow 1. When the valves V1 and V2 are closed, chamber A is under inlet pressure. 2. A hole D in the filter housing connects min. pressure switch with chamber A. If the inlet pressure applied to the pressure switch exceeds the incoming reference value, it switches through to the automatic burner control. 3. After release by the automatic burner control, valve V1 and stage 1 of valve V2 open. The gas flows through chambers A, B and C of the GasMultiBloc. 4. On request, the second stage of valve V2 opens. Operating method of valve-regulator combination on valve V1 A regulator compensating for residual pressure is integrated in valve V1 (pressure regulating part). Armature 8 is not connected to valve plate unit 3. When it opens, armature 8 pretensions compression spring (V1) 5 and releases the valve plate unit. When the valve closes, the armature acts directly on the valve plate unit. The output pressure upstream ofP valve V2 is defined by Mp P N L L pretensioning regulating spring 7 (tension spring) via setting screw 18. The output pressure acts via opening E on the working diaphragm 22 of the regulator part. In regulated state, setting spring inlet pressure and pressure of working diaphragm are in force equilibrium. The compensating diaphragm ensures the fast closing function of valve V1 and a high regulating quality. Operating method of valve V2 P2 Armature P1 14 ofMp L2 V2 is connected to L1 N valve valve plate unit 12.When it opens, armature 14 pretensions closing spring 13. The valve opening of stage 1 can be set by limiting the armature stroke by means of the main volume restrictor 19. Min. opening (residual stroke) of valve (0.5 to 1.0 mm) L N P When the second stage Mp of valve 2 opens, closing spring 13 is continuously pretensioned. The maximum valve opening of stage 2 can be set by limiting the armature stroke of armature 16 using the main volume restrictor. Main volume restrictor 20 is set by rotating the adjusting plate or the hydraulic brake . The fast and/or slow opening characteristic acts on both stages. It is influenced by setting the fast stroke at the hydraulic brake under the cover. Closing function When the supply voltage to the solenoid coils of valves V1 and V2 is interrupted, they are closed within < 1 s by the compression springs.

Sectional drawing of MB-ZRDLE... 21 20

19 17

18

16

V2/2

11 10 9 8

15

D

7

14

V2/1

6

13 12

5 4

V1

3 2

p1

p2

1

A

P2 L2

P1 L1

1 2 3 4 5 6 7 8 9

B

Mp N

Pressure regulator Microfilter Valve V1 Connection flange Closing spring V1 Housing Regulating spring Armature V1 Solenoid V1

10 11 12 13 14 15 16 17

22

C

23 E

Setting: 18 - Gas pressure pa 19 - Partial volume, 1st stage 20 - Main volume 21 - Fast stroke 22 Working diaphragm 23 Compensation diaphragm

Gas pressure switch Electrical connection Valve V2 Closing spring V2 Armature V2 (1st stage) Solenoid V2 (1st stage) Armature V2 (2nd stage) Solenoid V2 (2nd stage)

Pressure taps 2 3 pe

0

4 pa

5 pBr

1

6 2

0

4 pa

3 pe

1

6

0 Filter cover 1, 3, 4, 6 G 1/8 screw plug 2 Test nipple 5 M4 screwed sealing plug

MP N

Mp N

P L

3

Mp N

P L

43

5 34

P1 L1

P2 L2

P1 L1

Mp N

5

Mp N

P L P1 L1

1

P2 L2

6

0

Electrical connection

P L

2

5 pBr

2

1

Mp N

3

2

P2 L2

P1 L1

N Mp

MP N

P2 L2

L P

1

P2 L2

3

2

P1 L1

Valves V1, V2 1st stage P2 P1 Mp L1

N

L2

Valve V2 2nd stage

N Mp

0

2 3 pe

4 pa

L P

5 pBr

2â&#x20AC;Ś6


Specifications Nominal diameters Flange with pipe threads as per ISO 7/1 (DIN 2999)

MB-ZR…405/407 B01 Rp 1/2, 3/4 and their combinations

Max. operating pressure

360 mbar (36 kPa)

Output pressure ranges

MB-… S20/S22 pa: 4 mbar (0.4 kPa) to 20 mbar (2 kPa) MB-… S50/S52 pa: 4 mbar (0.4 kPa) to 50 mbar (5 kPa)

Media

Gases of families 1, 2, 3 and other neutral gaseous media

Ambient temperature

-15 °C to +70 °C (Do not operate MB-D below 0 °C in liquid gas systems. Only suitable for gaseous liquid gas, liquid hydrocarbons destroy sealing materials.)

Dirt trap

Sieve, microfilter, changing the filter is possible without removing the valve.

Pressure switches

Types GW…A5, ÜB…A2 / NB…A2 to DIN EN 1854 may be attached. For further information, refer to Datasheets 5.02 and 5.07 “Pressure Switches for DUNGS Multiple Actuators”

Pressure regulator

Pressure regulator compensated for residual pressure, leakproof seal when switched off by means of valve V1 as per DIN EN 88 Class A. Setpoint spring permanently installed (no spring exchange possible). A vent line above roof is not required. Internal pulse tap provided.

Solenoid valve V1

Valve as per DIN EN 161 Class A Group 2, fast closing, fast opening

Solenoid valve V2

Valve as per DIN EN 161 Class A Group 2, fast closing

3…6

MB-ZR MB-ZRD MB-ZRDLE MB-ZRLE

Valve V2 design fast opening fast opening slow opening slow opening

MB-ZR…410/412 B01 Rp 3/4, 1, 1 1/4 and their combinations

Partial volume restrictor with with with with

Main volume restrictor without with with without

Measuring / Ignition gas connection

For G 1/8 as per DIN ISO 228, refer to Pressure taps on page 2

Burner pressure monitor pBr

Connection downstream of valve V2, pressure switch A2 mountable on adapter laterally

Voltage / Frequency

50-60 Hz 220-230 V AC -15 % +10 % Other preferred voltages: 240 V AC, 110-120 V AC, 48 VDC, 24-28 VDC

Electrical connection

Plug connection as per DIN EN 175301-803 for valves and pressure switches

Rating / Power consumption Switch-on duration Degree of protection Radio interference

Refer to Dimensions on page 5 100 % IP 54 as per IEC 529 (EN 60529) Interference degree N

Materials of gas conveying parts

Housing Diaphragms, seals Solenoid drive

Installation position

Solenoid vertically upright or lying horizontally as well as its intermediate positions.

Closed position signal contact

Closed position signal contact, type K01/1 (DIN-tested), mountable on V2

aluminium die casting NBR basis, Silopren (silicone rubber) steel, brass, aluminium


Mp N

Mp N

Equipment variants GasMultiBloc®...B01 Two-stage function MB-ZR MB-ZRD MB-ZRDLE MB-ZRLE Microfilter with sieve Gas pressure switch downstream of filter downstream of valve V2 on adapter laterally Pressure regulator P Valve L V1, double seat Valve V2, single seat Valve V2, double seat Valves opening together Valves opening separately Flange Rp 1/2 Rp 3/4 Rp 1 Rp 1 1/4

405 B01

407 B01

• • • • •

• • • • •

• • • P1 • L1 •

• • • • • – • • • • – –

• • • • – • • • • • – –

• • • • • – • • – • • •

MB-ZR...B01 version V1 V2 3 4 5

412 B01 • • • P2 • L2 •

Mp N

• • • • – • • • – • • •

S 20, S 50 S 22, S 52 • = possible (•) = on request - = not possible

4

= Valve 1 = Valve 2 = Dirt trap = Pressure switch = Regulator

3 V1

Mounting of VPS 504 valve proving system possible P2 Mounting of K01/1 closed position signal contact possible L2 Type key of MultiBloc

410 B01

5

2 3 pe

0

®

V2

4 pa

5 pBr

��������������������������������������� �������������������� 0 = common 2 = separated

1

��������������� 2 = 4 - 20 mbar 5 = 4 - 50 mbar

�������������� up to 360 mbar up to 360 mbar

�����������������������������

N Mp

L P

6

0

3 pe

��������������������������� 1 = two A valves for main gas + regulator 7 = two A valves for main gas, one A valve together with V1 as internal bypass around V2 + regulator

4 pa

5 pBr

�������������������������� ����������������������������������� 403 = DN 10, V2 = Single-seat valve 405 = DN 15, V2 = Single-seat valve 407 = DN 20, V2 = Double-seat valve 410 = DN 25, V2 = Single-seat valve 412 = DN 32, V2 = Double-seat valve 415 = DN 40, V2 = Double-seat valve 420 = DN 50, V2 = Double-seat valve ������������������������������������������ without = (MB or MB-ZR) -D = Main volume restrictor -LE = adjustable opening behaviour -DLE = D + LE combination without = single stage ZR = double-stage with partial volume setting first stage ���������

4…6


Dimensions [mm]

d = Space requirement for cover of pressure switch k = Space requirement for exchanging the solenoid l = Space requirement for K01/1 closed position signal contact Type

Rp

Opening time

a

MB-ZRD 405/407 B01 MB-ZRDLE 405/407 B01 MB-ZRD 410/412 B01 MB-ZRDLE 410/412 B01

Rp 1/2 Rp 3/4 Rp 1 Rp 1 1/4

< 1s < 20 s < 1s < 20 s

110 130.5 151 110 130.5 151 140 162.5 185 140 162.5 185

Rating/power consumption [VA] 230 V AC; +20 °C:

5…6

MB-ZR 405/407 S 20 MB-ZR 405/407 S 50 MB-ZR 405/407 S 22 MB-ZR 405/407 S 52

65 65 70 70

MB-ZR 410/412 S 20 MB-ZR 410/412 S 50 MB-ZR 410/412 S 22 MB-ZR 410/412 S 52

80 80 120 120

b

c

Dimensions [mm] f g h i d e 40 120 40 120 40 145 40 145

50 50 50 50

46 46 55 55

115 170 115 210 135 225 135 260

k

l

Weight [kg]

230 230 300 300

80 80 80 80

3.1 3.2 6.4 6.5


GasMultiBloc® Combined regulator and safety shut-off valves Two-stage function MB-ZRD(LE) 405 - 412 B01

MB-412 S50, S52

MB-412 S20, S22

MB-407 S50, S52 MB-410 S50, S52

MB-410 S20, S22

MB-407 S20, S22

MB-405 S20, S22 MB-405 S50, S52

Volumetric flow pressure loss characteristics in regulated state with microfilter

p = 3 mbar Br

360 300 200 150

Recommended operating range

100 80

60 50

40

∆p [mbar]

30

p5

/4

/4 Rp

Rp

1-

5/4

Rp

-R

1

p3 10

)4

)4 MB

-ZR

(D

LE

LE (D -ZR

MB

12

-R

3/4

1/2

Rp

Rp

07

05

)4

)4

LE

LE

(D

(D

-ZR

-ZR

MB

MB

-R

2 41 41 E) -ZR MB

Vm

Vm

in.

4 3

in.

MB

-ZR

(DL

6 5

(DL

E)

40

5/

8

0/

40

7

10

p1

/2

20

2

Basis Based on Base Base

1 0,1

0,2

0,2

f=

0,3 0,4 0,5 0,6 0,8 1

2

3

4

5 6 7 8 9 10

20

° [m3/h] Luft / Air / Aria dv = 1,00 Vn

0,3 0,4 0,50,6 0,8 1

Dichte Luft Spec. weight air poids spécifique de l'air peso specifico aria Dichte des verwendeten Gases Spec. weight of gas used poids spécifique du gaz utilisé peso specifico del gas utilizzato

2

3

4

5 6 7 8 9 10

20

30

30

40

+ 15° C, 1013 mbar, trocken + 15° C, 1013 mbar, dry + 15° C, 1013 mbar, sec + 15° C, 1013 mbar, secco

40

60

60

80 100

80 100

° [m3/h] Erdgas/Natural gas/Gaz Naturel/Gas metano dv = 0,65 Vn

Gas type

Density [kg/m3]

Nat. gas City gas LPG Air

0.81 0.58 2.08 1.24

200

200

dv

f

0.65 0.47 1.67 1.00

° V = verwendetes Gas/gas used/ gaz utilisé/gas utilizzato

1.24 1.46 0.77 1.00

° V Luft/air/air/aria x f

We reserve the right to make any changes in the interest of technical progress. Head Offices and Factory Karl Dungs GmbH & Co. KG Siemensstraße 6-1 D-73660 Urbach, Germany Telephone +49 (0)7181-804-0 Fax +49 (0)7181-804-166

Postal address Karl Dungs GmbH & Co. KG Postfach 12 29 D-73602 Schorndorf, Germany e-mail info@dungs.com Internet www.dungs.com

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